I've attended my share of seminars (often free around NYC) by pro photographers and it never fails to amaze me how little technical information they know (or disclose) about the process.
My suggestion is to learn absolutely everything that you can about the process and the tools with which you work.
After a while it becomes intuitive.
Low light:
1) stabilize
2) stabilize some more
3) get close, reflected light quickly dissipates with distance
4) fast glass, and any vibration reduction possible
5) highest ISO for tolerable noise or grain
6) belief in some higher power helps, ask kindly for intervention
7) sneak in some extra light, someway, somehow, you can always apologize later
(so what if you're thrown out?)